:(6) 1876 a c - 1977 0.8517300db/km.19785db/km.80-81pin841986 - 2a xt- -yt -a: b:rbf 2rx=exp-1x-c1/c*c 1a b 2a b 3 4 5 6 , gsm3btshrl,vrl, 890mhz-915mhz;935mhz-960mhz(6) o 2012320125-iso9001slidcslp(6)1. -2. -10gsm:-gsm,-omc-gsmgps-104-3-20126 8 1(1) 23422.1. -2000,
